Your manuals, drivers and scan software are on the Canon website. I can't see the buttons on the left, but if there is not one that says scan like there is on my MG7120, then the scanning is driven from the software program that comes with it. The specs just says

"Scanner Features
Auto Scan Mode, Push Scan"

which indicates to me one of those buttons is the scan button. I tried to download your manual, but it is an exe file, which is very odd.